Reviews — YorJcsMre Geological Society. 273 



stratum from which Mr. A. Bell obtained them is regarded by him 

 as " a passage-bed between the London Clay and the Bracklesham 

 series." From the Eocene beds of England Mr. Vine here enumerates 

 8 species of the Cyclostomata ; and 21 of the Gheilostomata ; and he 

 describes 3 of the former, and 4 of the latter group. 



V. A. S. Woodward, treating of the " Hybodont and Cestaciont 

 Sharks of the Cretaceous Period," first refers to the characteristics of 

 the Hybodus of the Lias and other Mesozoic formations, and proceeds 

 to describe in detail some of the special characters well shown in 

 remains of Hyhodus basaniis, collected from the Wealden beds of the 

 Hasting coast by the late Mr. S. H. Beckles, and now in the British. 

 Museum. One of the specimens is shown in pi. i. and another in 

 pi. ii. fig. 1. A dorsal fin-spine of Synechodon (?) from the Gault, 

 p. 66, is figured in pi. ii. fig. 2. Some characteristic teeth of 

 Synechodas I tlingworthi (formerly recognized as Acrodus or Hyhodus) 

 QXQ described pp. 66, 67, and figured pi. ii. figs. 1-7. The author 

 considers that DrepnnepJionis, and some Cretaceous teeth known as 

 Strophodiis and Acrodus belong to Cestracion or the Port Jackson 

 Shark ; and one of these, Acrodus rugosus, he hei'e describes and 

 figures, p. 67, pi. ii. fig. 8. 



VI. J. E. Bedford directs attention to "Evidences of Glacial 

 Action near Leeds," on the Ganiston beds of the Lower Carboniferous 

 shales and grits quarried at Headingley, in the valley below Mean- 

 wood, He notices moraine material of sandy clay, with irregular 

 patches of sand, and containing great quantities of subangular blocks 

 of grit-rock derived from the Ganiston beds. The shales below have 

 also been much bent and crushed. The probable direction and range 

 of the ice are discussed. 



VII. J. S. Tute desci'ibes a limestone conglomerate of Permian 

 age at Markington, and 'a section of Permian beds near Wormald 

 Green. 



VIII. G. R. Vine describes (pp. 74-92), and figures in plates iii. 

 and iv. some peculiar Palgeozoic Polyozoa, belonging to the genera : — 

 1. Vinella, Ulrich ; 1 species and variety : 2. Ascodictyon, Nicholson 

 and Etheridge, jun. ; 7 species : 3. Rhopalonaria ; 2 species. These 

 appear to be Ctenostamatous Polyzoa and early representatives of 

 the Stoloniferous Vesicnlaridce, or possibly of the Eutoprocta. The 

 late Mr. Busk noted that Mr. Vine was the first to indicate this 

 alliance and Mr. Ulrich accepted it, and added the genus Vinella to 

 the group. They belong to the Silurian, Devonian, and Carboniferous 

 formations of Britain and America. They consist of creeping or 

 attached stolon-like threads, with numerous vesicles (cells ? or 

 zooecia?), and plate iv. illustrates Ascodictyum siluriense and the 

 recent Valkeria tuberosa together for comparison of the fossil and 

 recent forms. 



IX. R. Reynolds illustrates by diagram the Intense Rainfall at 

 Leeds on July 19th, 1891. 



X. J. Spencer, proving " the Affinity of Dadoxylon to Cordaites," 

 observes (p. 104) that '"so long as Dadoxylon was regarded as a 

 true Pine, it appears to afi'ord a strong ai'gument against the theory 



DKCAUE III. VOL. IX. NO. VI. 18 



